I have a number of tubescreamers and clones and this is the one which is a permanent feature on my pedal boards. Unlike a standard Ibanez tubescreamer this has 3 band tone controls (bass, middle and treble) with a huge sweep in tone across each of them. The nice feature is the mini toggle switch which engages the FULL sound. THis takes it out of the usual tubescreamer and fills in the bottom end when the drive is quite high. For already distorted amps this makes it a bit woolly but for a slightly cranked amp, it gives a beautiful tone. On the normal setting this acts like a normal tubescreamer and can really tighten a a cranked amp. For the price, it is a bargain when compared to standard tubescreamer and it has the usual Wampler impeccable build quality. Highly Recommended.